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Date: Dec 10, 2002
Posted by: Michael Gochfeld (gochfeld@eohsi.rutgers.edu)

I agree with Dominick's general observation on the overall similarity of the case fatality rate in my three arbitrary sub-groups.

However, Indiana does seem to be an anomaly. They are significantly different just be inspection, but since the question was asked the chi square value is 20 (df=1), which gives a probability value withs lots of zeros

Several good suggestions have been made including that State Health departments might have different ways or dates for reporting. We'll check this again after New Years.

Mike Gochfeld

"Ninivaggi, Dominick" wrote:

Have you tested this for statistical significance? Assuming it is significant, it's interesting that the mortality rates are pretty similar, especially between the group with the most cases and those with the least. This would suggest that the states with high numbers for the most part do not have a looser case definition, so the high number of cases is not entirely an artifact.

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